From 252086e2e6cd62dee7f21a40e9f5db2e6009df31 Mon Sep 17 00:00:00 2001
From: Edwin Eefting <edwin@datux.nl>
Date: Sun, 17 May 2020 22:01:12 +0200
Subject: [PATCH] another option that is unsupported in older versions

---
 bin/zfs-autobackup | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/bin/zfs-autobackup b/bin/zfs-autobackup
index 8b2c457..79da5df 100755
--- a/bin/zfs-autobackup
+++ b/bin/zfs-autobackup
@@ -990,7 +990,7 @@ class ZfsDataset():
         #verbose output
         cmd.append("-v")
 
-        if 'extensible_dataset' in features:
+        if 'extensible_dataset' in features and "-s" in self.zfs_node.supported_recv_options:
             #support resuming
             self.debug("Enabled resume support")
             cmd.append("-s")
@@ -1355,6 +1355,17 @@ class ZfsNode(ExecuteNode):
                 ret.append(option)
         return(ret)
 
+    @cached_property
+    def supported_recv_options(self):
+        """list of supported options"""
+        #not every zfs implementation supports them all
+
+        ret=[]
+        for option in ["-s" ]:
+            if self.valid_command(["zfs","recv", option, "zfs_autobackup_option_test"]):
+                ret.append(option)
+        return(ret)
+
 
     def valid_command(self, cmd):
         """test if a specified zfs options are valid exit code. use this to determine support options"""